Attemperator for superheated steam



April 12, 1932. COOPER 1,853,662

ATTEMPERATOR FOR SUPERHEATED STEAM Filed 001;. 16, 1930 j/WEBQEV Y WJMMY W ATTORN EYS Patented A r. 12, 1932 UNITED STATES PATENT OFFICE- ial LESTER H. COOPER, F ELIZABETH, .NEW LIERsEY, .ASSIGNOR To THE tIBABCOCK J'z wrrcox COMPANY, oEBAYoNNE, NEW JERSEY, A CORPORATION on NEW JERSEY 1 ATTEMPERATOR on sUP RrrEA'rEn STEAM Application filed October is, 1930; Serial No. 489,023.

' This invention relates toa device by means of which superheated steam leaving a boiler can be cooled by means of steam or a mixture of steam and water that is flowing through a natural circulation circuit of the boiler.

The invention will be understood from the description in connection with the accomsteam and water drum 2, nipples 3 connecting the water space of-the drum 2 to the downtake headers 4;,the bank of inclined tubes 5 extending from the headers l to the uptake headers 6, and the circulation tubes 7 extending from 2 the headers 6 to the steam space of the steam and water drum 2. p r

The upperportions of the furnace wall tubes 8 are indicated in the drawing as, ex-

tending into horizontally disposed upper headers 9 which are connected to the steam space of the steam and water drum 2 in the usual way. The tubes 10 are indicated for this purpose on the right-hand'side of the drawing The lower ends ofthe tubes-8 are connected to headers (not shown) which are connected to the water space of the boiler in the well known manner.

A plurality of tubes 11 connect thesteam space of the steam and water drum2 to the inlet header 12 of the superheater 13, these tubes 11 being distributedlongitudinally of the drum 2 and header 12. The superheater tubes 13 are connected to the superheater outlet header 14 andan outlet'pipe 15 is connected to the header 145 The pipe 15 is provided with a valve 16 by means of which a portion or all of the steam passing through the pipe 15 can be diverted to flow through the U-tubes 17 in the cooler or attemperator 18 and thence through the outlet 19, as shown by the arrows,-to the steam main. The tubes 17 are inside of the casing of the cooler 18, which casing is connected by means of the pipe 20 to the upper header 9 of the water wall tubes 8, so that steam or a mixcirculation through the natural circulation system, and'also to a lesser extent upon the circulating cooling fluid. f I claim:

ture of steam and'water passes from theheader 9 into the casing of the cooler 18 surrounding the tubes 17, thus cooling the superheated steam that passes through these tubes. The steam or mixture "of steam and water then passes from the cooler 18 through the pipe 21 7 into the steam space of the steam and water 'drum 2. V

. By adjusting the valve 16 any desired portion of the superheated through the pipe 15 can be passed throu'gh the attemperator or cooler 18, thus regulating the temperature of the superheated steam as it passes out through the outlet 19. I

The superheated steam is attemperated by cooling fluid thatpasses through the attemperator due to circulation in the natural circulation system of the boiler and the amount of such cooling fluid depends upon the rate of heat given up by the'superheated steam'to the 1. An attemperator for limiting'the tem perature of superheated steam comprising,.in combination, a natural circulation steam boiler section including risers and asteam and water drum, a steam superheater receiving steam'from said drum, an attemperator 8h 1 chamber forming a part of said risers so that a mixture of steam and water passes through 7 said chamber in a continuous and positive unidirectional flow, attemperator tubesconducting superheated steam through said chamber and out of contact with 'sa'id mix- 'ture, means for conducting steam from said superheater to the inlet ends of'said tubes, and thence'from the, outlet ends of the tubes to apoint of use. A 1 v2. Apparatus of'the class described comprising, in combination, steam forming and mixture conducting risers forming part of 'a steam boiler,' a steam superheater, an at temperator chamber forming a part ofthe risers so that a mixture of steam and water passes through the chamber in a continuous and positive flow in one direction, and

means for conducting the superheatedsteam steam passing 60' ture passed therethrough, a conductor leading from the superheater to the inlet ends of said tub-es, a second conductor leading from the discharge ends of said tubes to a point of use, a Wall separating said conductors and the inlet and discharge ends of said tubes, and means in the Wall for causing all or any desired part of the steam to pass through the chamber or to permit all of the steam to by,-

pass the chamber and proceed directly to the point ofuse at the Will of the attendant.

l, An attemperator for controlling the temperature of superheated steam comprising, in combination, a steam boiler including risers and a steam and Water drum, a steam superheater receiving steam from the boiler,

an attemperator chamber connected in a flow circuit toand from the drum so that a mixture of steam and Water passes through said chamber in a circuit to the drum wherein the flow is induced by means external to the drum and the chamber, an attemperator tube con ducting superheated steam through said chamber out of contact with said mixture,

vmeans for conducting steam from said superheater to the inlet end of said tube, and. thence from the outlet end of the tube to a point of use. p

5. Apparatus of the class described comprising, in combination, steam forming and mixture conducting risers forming part of steam boiler, a steam superheater, an attemperator chamber directly connected to a riser so that Water passes through the chamber in a positive unidirectional flow and means for conducting the superheated steam through the chamber out of contact with the high Velocity Water.

6. Apparatus of the class described comprising, in combination, a steam and Water drum. steam forming and mixture conducting risers forming part of a steam boiler, a steam superheater, an attemperator chamber in communication with a riser so that Water passes through the chamber. in a positive unidirectional fioW induced externally of the drum and the chamber, means in the attemperator chamber conducting steam through the chamber out of contact with the Water passing therethroug-h, a conductor leading from the superheater to the inlet ends of said means, a second conductor leading from the discharge end of said means to a point of use, and regulating means for causing all or a desired part of the steam to pass through the chamber or to permit all of the steam to by-pass the chamber and proceed directly to the point of use at the will of the attendant.

7. An. attemperator for limiting the temperature of superheated steam comprising, a steam and Water drum, in combination, a natural circulation steam boiler section ineluding furnace Wall risers and a steam and Water drum, a steam superheater receiving steam from said drum, an attemperator chamber' forming a part of said risers so that a mixture of steam and Water passes through said chamber in positive unidirectional flow induced externally of the drum and the chamber, attemperator tubes conducting superheated steam through said chamber out of contact With said mixture, means for conducting steam from said superheater to the inlet ends ofsaid tubes, and thence from the outlet ends of the tubes to a point of use.

8. Apparatus ot the class described comprising, in combination, steam forming and mixture conducting risers constituting the Water tube furnace Wall part of a steam boiler, a steam super-heater, an attemperator chamber directly connected to a riser so that Water passes through the chamber in a positive unidirectional flow induced externally of the chamber, and means for conducting the superheated steam through the chamber out of contact With the high velocity Water, so that the temperature of the steam may be lowered. a

9. Apparatus of the class described comprising, in combination, steam forming and mixture conducting risers forming a part of a Wallof a steam boiler furnace, a steam superheater, an attemperator chamber directly connected to a riser so that Water passes the chamber in a positive unidirectional flow, a conductor in the attemperator chamber passing steam through the chamber out of contact with the water moving therethrough, a second conductor leading from the superheater to the inlet end of the first conductor, a third conductor leading from the discharge end of the first conductor to a point of use, and means for causing all or a desired part of the steam to pass through the chamber or to permit all of the steam to by-pass the chamber and proceed directly to the point of use at the will of the attendant.

LESTER H. COOPER. 

